Diaphragm device for camera

Details Diaphragm device for camera Diaphragm device for camera

1987-05-19

1988-03-15

Hix, L. T.

354274, G03B 902

Patent

active

047316268

ABSTRACT:
The present invention is directed to a diaphragm device and, more particularly, to a device for adjusting a position of a guide groove connected to a diaphragm blade to control movement of the diaphragm blade, thereby adjusting a diaphragm opening. The present invention provides a diaphragm device including means for adjusting said diaphragm opening in which a position of a guide groove for defining a reduced opening state of the diaphragm is movable about a pivot axis corresponding to a position of the guide groove where the diaphragm is in full open state, thereby adjusting the opening characteristic at the side of the reduced opening state.

REFERENCES:
patent: 4470679 (1984-09-01), Starp
patent: 4601564 (1986-07-01), Yamamoto

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